Which of the followings is a stop signal for transcription?
Correct answer: C. GC
- A. CA
- B. GA
- C. GC
- D. TA
Explanation
The stop sequences at the end of the gene terminate the synthesis of mRNA. The simplest stop signal is a series of GC base pairs followed by a series of AT base pairs. The RNA formed in this region forms a GC hairpin followed by four or more U ribonucleotides. The hairpin causes RNA polymerase to stop synthesis.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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